Driving device.



B. D. JACKSON.

I DRIVING DEVICE. APPLIOATION FILED NOV. 7, 1912.

1,072,616, Patented Sept. 9, 1913.

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coLuMl'nA PLANOGRAPH co..wAsmNc'mN.n. c.

B. D. JACKSON.

DRIVING DEVICE.

APPLICATION FILED NOV. 7, 1912.

Patented Sept. 9, 1913.

2 SHEETS-SHEBT 2.

AZZJ/M/ COLUMBIA PLANOCIRAPH 60., WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

BYRON D. JACKSON, 0F ERIE, PENNSYLVANIA, ASSIGNOR TO MODERN TOOLCOMPANY, OF ERIE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

DRIVING DEVICE.

Specification of Letters Patent.

Application filed November 7, 1912. Serial No. 730,097.

To all whom it may concern:

Be it known that I, BYRON D. JAoKsoN, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented new and useful Improvements in Driving Devices HavingIntermittent Movement, of which the following is a specification.

This invention relates to driving devices having intermittent movementand consists in certain improvements in the construction thereof as willbe hereinafter fully described and pointed out in the claims.

There are many machines in which there is a driving and a drivenelement, one mounted on the other, and one arranged to slide on theother, in which the parts are given rotative movement and the drivingpressure between the parts or elements is intermittent as for instancein a reversing mechanism where the clutch element has at each reversal adifferent direction of driving pressure. Such mechanisms have ordinarilybeen provided with a square spline and groove but it is difficult toretain these in proper working order due to the constant strain uponsome parts ofi metal.

The object of the invention is to improve this driving device.

In the accompanying drawings, I have shown the invention as applied to areversing device.

Figure 1 shows a perspective view of the clutch block of the reversingdevice. Fig. 2 is a plan view of such device. Fig. 3 is a front view ofa part of the carriage showing the reversing stop and rock lever. Fig. 4is an end View, partly in section of a part of the connecting mechanismfor actuating the reversing device.

1 marks the reversing shaft, 2 the clutch block, 3 a cylindrical key, 4a semi-cylindrical keyway and 5 a semi-cylindrical keyway completingwith the keyway 4 a cylindrical keyway to receive the cylindrical key 3.

The clutch block in this instance is mounted on a slight enlargement 1of the shaft and in its use is moved longitudinally along the shaft backand forth to effect a reverse of the driving mechanism. At each reversalthe direction of strain on the key is reversed. I have found that wherea key especially of a cylindrical shape is used in such a keyway withdevices having intermittent or reversing motion the action on the keyrevolves it so that new surfaces are con stantly presented. I have shownin Fig. 2 a reversing mechanism to which such a keyway is applied. Iwish to be understood that the specific type of reversing mechanismforms no part of this invention.

The mechanism shown is arranged for the carriage mechanism of a grindingmachine. This is driven by a drive wheel 6. The drive wheel 6 is mountedon a shaft 7 journaled in the bearing 8. The bearing 8 extends from thebracket 9 which is secured to the frame 10 of the machine. A gear 11 isfixed on the shaft 7 and meshes a gear 12. The gear 12 is carried by ashaft (not shown) carried by a bearing 13. The gear 12 is secured to abeveled gear 14. The beveled gear meshes the gears 15 and 16, said gearsbeing mounted on the shaft 1. Each of these gears has a clutch surface(not shown) for engaging the detent ends of the clutch block 2. Theclutch block has the circumferential groove 17 into which the pins 18extend. The pins are carried by the forked lever 19. The forked lever ispivoted on a pin 20 carried by the bracket 9. The lever 19 has anextension 21 which extends between the arms 22 of an actuating lever 23.The actuating lever 23 is connected by a link 24: with a rock lever 25.The rock lever is fixed on the rock shaft 26. A lever 27 is fixed on therock shaft 26 in the path of the stops 28 on a carriage 29. It will bereadily observed that as the carriage stops come into contact with thelever 27, the movement of this lever is communicated to the clutch block2 so as to throw the clutch block 2 from the gear 15 to gear 16 or viceversa, thus reversing the direction of movement of the shaft 1, thegears 15 and 16 being driven in opposite directions by reason of thefact that they mesh with opposite sides of the gear 14..

A clutch member 30 i fixed on the shaft 1 and engages a clutch member 31also on said shaft. A beveled gear 32 is secured to the clutch member 31and meshes with a gear 33 designed to drive the carriage. Any desiredconnecting mechanism may be arranged between the gear 33 and thecarriage.

It will be noted as the shaft 1 is reversed through the action of thegears 15 and 16 the key 3 is subjected to pressures varying in directionand it is also relieved of pressure intermittently. This being so,the-key revolves presenting slightly different surfaces to the drivingstrain with each action of the machine. In this way, the key can be keptin perfect condition so that the reversing movement of the block 2remains perfect-1y free. It will be understood, of course, that morethan one key 3 may be used if desired.

What I claim as new is 1. The combination of a driving element and adriven element, one slidingly mounted upon ,the other and having keywaysforming a cylindrical opening; a cylindrical key in said opening; andmeans for imparting intermittent movement to the driving element.

2. The combination of a driving element and a driven element, oneslidingly mounted upon the other and having keyways forming acylindrical opening; a cylindrical key in said opening; and means forimparting an intermittent and reversing movement to the driving element.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

BYRON D. JACKSON.

Witnesses:

B. M. HARTMAN, H. C. LORD.

copies ofthis patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

